wip: Tests for diagnostics command

Don't currently work because `-c` doesn't seem to be honoured.

cmd/diagnostic_test.go

@@ -0,0 +1,93 @@
+package cmd_test
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"os/exec"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"github.com/onsi/gomega/gbytes"
+	"github.com/onsi/gomega/gexec"
+)
+
+var _ = Describe("Diagnostic", func() {
+	var (
+		config  *os.File
+		command *exec.Cmd
+	)
+
+	BeforeEach(func() {
+		var err error
+		config, err = ioutil.TempFile("", "cmd_test")
+		Expect(err).ToNot(HaveOccurred())
+
+		command = exec.Command(pathCLI, "-c", config.Name(), "diagnostic")
+	})
+
+	AfterEach(func() {
+		Expect(os.Remove(config.Name())).To(Succeed())
+	})
+
+	Context("token and endpoint set in config file", func() {
+		BeforeEach(func() {
+			_, err := config.Write([]byte(`
+endpoint: https://example.com/graphql
+token: mytoken
+`))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(config.Close()).To(Succeed())
+		})
+
+		It("print success", func() {
+			session, err := gexec.Start(command, GinkgoWriter, GinkgoWriter)
+			Expect(err).ShouldNot(HaveOccurred())
+			Eventually(session.Err.Contents()).Should(BeEmpty())
+			Eventually(session.Out).Should(gbytes.Say("GraphQL API endpoint: https://example.com/graphql"))
+			Eventually(session.Out).Should(gbytes.Say("OK, got a token."))
+			Eventually(session).Should(gexec.Exit(0))
+		})
+	})
+
+	Context("token not set in config file", func() {
+		BeforeEach(func() {
+			_, err := config.Write([]byte(`
+endpoint: https://example.com
+`))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(config.Close()).To(Succeed())
+
+			var stdin bytes.Buffer
+			stdin.Write([]byte(`mytoken`))
+			command.Stdin = &stdin
+		})
+
+		It("prompt for token and print success", func() {
+			session, err := gexec.Start(command, GinkgoWriter, GinkgoWriter)
+			Expect(err).ShouldNot(HaveOccurred())
+			Eventually(session.Err.Contents()).Should(BeEmpty())
+			Eventually(session.Out).Should(gbytes.Say("Please enter your CircleCI API token:"))
+			Eventually(session.Out).Should(gbytes.Say("OK, got a token."))
+			Eventually(session).Should(gexec.Exit(0))
+		})
+	})
+
+	Context("token set to empty string in config file", func() {
+		BeforeEach(func() {
+			_, err := config.Write([]byte(`
+endpoint: https://example.com
+token: 
+`))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(config.Close()).To(Succeed())
+		})
+
+		It("print error", func() {
+			session, err := gexec.Start(command, GinkgoWriter, GinkgoWriter)
+			Expect(err).ShouldNot(HaveOccurred())
+			Eventually(session.Err).Should(gbytes.Say("Please set a token!"))
+			Eventually(session).Should(gexec.Exit(1))
+		})
+	})
+})